Add PdfObjectBase to PdfDataType.output

@@ -65,7 +65,7 @@ class PdfArray<T extends PdfDataType> extends PdfDataType {
   }
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     if (indent != null) {
       s.putBytes(List<int>.filled(indent, 0x20));
       indent += kIndentSize;
@@ -88,7 +88,7 @@ class PdfArray<T extends PdfDataType> extends PdfDataType {
             s.putByte(0x20);
           }
         }
-        val.output(s, indent);
+        val.output(o, s, indent);
       }
       if (indent != null) {
         s.putByte(0x0a);

@@ -18,6 +18,7 @@ import 'dart:typed_data';
 
 import 'package:meta/meta.dart';
 
+import 'object_base.dart';
 import 'stream.dart';
 
 const kIndentSize = 2;
@@ -25,11 +26,11 @@ const kIndentSize = 2;
 abstract class PdfDataType {
   const PdfDataType();
 
-  void output(PdfStream s, [int? indent]);
+  void output(PdfObjectBase o, PdfStream s, [int? indent]);
 
   PdfStream _toStream() {
     final s = PdfStream();
-    output(s);
+    output(const PdfObjectBase(objser: 0), s);
     return s;
   }
 

@@ -15,6 +15,7 @@
  */
 
 import 'base.dart';
+import 'object_base.dart';
 import 'stream.dart';
 
 class PdfBool extends PdfDataType {
@@ -23,7 +24,7 @@ class PdfBool extends PdfDataType {
   final bool value;
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     s.putString(value ? 'true' : 'false');
   }
 

@@ -58,7 +58,7 @@ class PdfDict<T extends PdfDataType> extends PdfDataType {
   }
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     if (indent != null) {
       s.putBytes(List<int>.filled(indent, 0x20));
     }
@@ -87,7 +87,7 @@ class PdfDict<T extends PdfDataType> extends PdfDataType {
           s.putByte(0x20);
         }
       }
-      v.output(s, indent);
+      v.output(o, s, indent);
       if (indent != null) {
         s.putByte(0x0a);
       }

@@ -26,7 +26,6 @@ import 'stream.dart';
 
 class PdfDictStream extends PdfDict<PdfDataType> {
   factory PdfDictStream({
-    required PdfObjectBase object,
     Map<String, PdfDataType>? values,
     Uint8List? data,
     bool isBinary = false,
@@ -34,7 +33,6 @@ class PdfDictStream extends PdfDict<PdfDataType> {
     bool compress = true,
   }) {
     return PdfDictStream.values(
-      object: object,
       values: values ?? {},
       data: data ?? Uint8List(0),
       encrypt: encrypt,
@@ -44,7 +42,6 @@ class PdfDictStream extends PdfDict<PdfDataType> {
   }
 
   PdfDictStream.values({
-    required this.object,
     required Map<String, PdfDataType> values,
     required this.data,
     this.isBinary = false,
@@ -54,8 +51,6 @@ class PdfDictStream extends PdfDict<PdfDataType> {
 
   Uint8List data;
 
-  final PdfObjectBase object;
-
   final bool isBinary;
 
   final bool encrypt;
@@ -63,7 +58,7 @@ class PdfDictStream extends PdfDict<PdfDataType> {
   final bool compress;
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     final _values = PdfDict(values);
 
     Uint8List? _data;
@@ -71,9 +66,9 @@ class PdfDictStream extends PdfDict<PdfDataType> {
     if (_values.containsKey('/Filter')) {
       // The data is already in the right format
       _data = data;
-    } else if (compress && object.deflate != null) {
+    } else if (compress && o.deflate != null) {
       // Compress the data
-      final newData = Uint8List.fromList(object.deflate!(data));
+      final newData = Uint8List.fromList(o.deflate!(data));
       if (newData.lengthInBytes < data.lengthInBytes) {
         _values['/Filter'] = const PdfName('/FlateDecode');
         _data = newData;
@@ -92,13 +87,13 @@ class PdfDictStream extends PdfDict<PdfDataType> {
       }
     }
 
-    if (encrypt && object.encryptCallback != null) {
-      _data = object.encryptCallback!(_data, object);
+    if (encrypt && o.encryptCallback != null) {
+      _data = o.encryptCallback!(_data, o);
     }
 
     _values['/Length'] = PdfNum(_data.length);
 
-    _values.output(s, indent);
+    _values.output(o, s, indent);
     if (indent != null) {
       s.putByte(0x0a);
     }

@@ -15,6 +15,7 @@
  */
 
 import 'base.dart';
+import 'object_base.dart';
 import 'stream.dart';
 
 class PdfIndirect extends PdfDataType {
@@ -25,7 +26,7 @@ class PdfIndirect extends PdfDataType {
   final int gen;
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     s.putString('$ser $gen R');
   }
 

@@ -15,6 +15,7 @@
  */
 
 import 'base.dart';
+import 'object_base.dart';
 import 'stream.dart';
 
 class PdfName extends PdfDataType {
@@ -23,7 +24,7 @@ class PdfName extends PdfDataType {
   final String value;
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     assert(value[0] == '/');
     final bytes = <int>[];
     for (final c in value.codeUnits) {

@@ -15,13 +15,14 @@
  */
 
 import 'base.dart';
+import 'object_base.dart';
 import 'stream.dart';
 
 class PdfNull extends PdfDataType {
   const PdfNull();
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     s.putString('null');
   }
 

@@ -15,6 +15,7 @@
  */
 
 import 'base.dart';
+import 'object_base.dart';
 import 'stream.dart';
 
 class PdfNum extends PdfDataType {
@@ -27,7 +28,7 @@ class PdfNum extends PdfDataType {
   final num value;
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     assert(!value.isNaN);
     assert(!value.isInfinite);
 
@@ -72,12 +73,12 @@ class PdfNumList extends PdfDataType {
   final List<num> values;
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     for (var n = 0; n < values.length; n++) {
       if (n > 0) {
         s.putByte(0x20);
       }
-      PdfNum(values[n]).output(s, indent);
+      PdfNum(values[n]).output(o, s, indent);
     }
   }
 

@@ -34,12 +34,17 @@ enum PdfVersion {
   pdf_1_5,
 }
 
-mixin PdfObjectBase {
+class PdfObjectBase {
+  const PdfObjectBase({
+    required this.objser,
+    this.objgen = 0,
+  });
+
   /// This is the unique serial number for this object.
-  int get objser;
+  final int objser;
 
   /// This is the generation number for this object.
-  int get objgen => 0;
+  final int objgen;
 
   /// Callback used to compress the data
   DeflateCallback? get deflate => null;

@@ -167,7 +167,7 @@ class PdfString extends PdfDataType {
   }
 
   @override
-  void output(PdfStream s, [int? indent]) {
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
     _output(s, value);
   }
 
@@ -185,51 +185,44 @@ class PdfString extends PdfDataType {
 }
 
 class PdfSecString extends PdfString {
-  const PdfSecString(this.object, Uint8List value,
+  const PdfSecString(Uint8List value,
       [PdfStringFormat format = PdfStringFormat.binary])
       : super(value, format);
 
   factory PdfSecString.fromString(
-    PdfObjectBase object,
     String value, [
     PdfStringFormat format = PdfStringFormat.literal,
   ]) {
     return PdfSecString(
-      object,
       PdfString._string(value),
       format,
     );
   }
 
   factory PdfSecString.fromStream(
-    PdfObjectBase object,
     PdfStream value, [
     PdfStringFormat format = PdfStringFormat.literal,
   ]) {
     return PdfSecString(
-      object,
       value.output(),
       format,
     );
   }
 
-  factory PdfSecString.fromDate(PdfObjectBase object, DateTime date) {
+  factory PdfSecString.fromDate(DateTime date) {
     return PdfSecString(
-      object,
       PdfString._date(date),
       PdfStringFormat.literal,
     );
   }
 
-  final PdfObjectBase object;
-
   @override
-  void output(PdfStream s, [int? indent]) {
-    if (object.encryptCallback == null) {
-      return super.output(s, indent);
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {
+    if (o.encryptCallback == null) {
+      return super.output(o, s, indent);
     }
 
-    final enc = object.encryptCallback!(value, object);
+    final enc = o.encryptCallback!(value, o);
     _output(s, enc);
   }
 }

@@ -117,7 +117,7 @@ class PdfXrefTable extends PdfDataType {
   }
 
   @override
-  void output(PdfStream s, [int? indent]) {}
+  void output(PdfObjectBase o, PdfStream s, [int? indent]) {}
 
   @override
   String toString() {
@@ -181,7 +181,7 @@ class PdfXrefTable extends PdfDataType {
       return true;
     }());
     s.putString('trailer\n');
-    params.output(s, object.verbose ? 0 : null);
+    params.output(object, s, object.verbose ? 0 : null);
     s.putByte(0x0a);
 
     return objOffset;
@@ -253,12 +253,11 @@ class PdfXrefTable extends PdfDataType {
     s.putString('$id 0 obj\n');
 
     PdfDictStream(
-      object: object,
       data: o.buffer.asUint8List(),
       isBinary: false,
       encrypt: false,
       values: params.values,
-    ).output(s, object.verbose ? 0 : null);
+    ).output(object, s, object.verbose ? 0 : null);
 
     s.putString('endobj\n');
     return objOffset;

@@ -338,28 +338,28 @@ class PdfGraphics {
     _buf.putString('q ');
     switch (img.orientation) {
       case PdfImageOrientation.topLeft:
-        PdfNumList(<double>[w, 0, 0, h, x, y]).output(_buf);
+        PdfNumList(<double>[w, 0, 0, h, x, y]).output(_page, _buf);
         break;
       case PdfImageOrientation.topRight:
-        PdfNumList(<double>[-w, 0, 0, h, w + x, y]).output(_buf);
+        PdfNumList(<double>[-w, 0, 0, h, w + x, y]).output(_page, _buf);
         break;
       case PdfImageOrientation.bottomRight:
-        PdfNumList(<double>[-w, 0, 0, -h, w + x, h + y]).output(_buf);
+        PdfNumList(<double>[-w, 0, 0, -h, w + x, h + y]).output(_page, _buf);
         break;
       case PdfImageOrientation.bottomLeft:
-        PdfNumList(<double>[w, 0, 0, -h, x, h + y]).output(_buf);
+        PdfNumList(<double>[w, 0, 0, -h, x, h + y]).output(_page, _buf);
         break;
       case PdfImageOrientation.leftTop:
-        PdfNumList(<double>[0, -h, -w, 0, w + x, h + y]).output(_buf);
+        PdfNumList(<double>[0, -h, -w, 0, w + x, h + y]).output(_page, _buf);
         break;
       case PdfImageOrientation.rightTop:
-        PdfNumList(<double>[0, -h, w, 0, x, h + y]).output(_buf);
+        PdfNumList(<double>[0, -h, w, 0, x, h + y]).output(_page, _buf);
         break;
       case PdfImageOrientation.rightBottom:
-        PdfNumList(<double>[0, h, w, 0, x, y]).output(_buf);
+        PdfNumList(<double>[0, h, w, 0, x, y]).output(_page, _buf);
         break;
       case PdfImageOrientation.leftBottom:
-        PdfNumList(<double>[0, h, -w, 0, w + x, y]).output(_buf);
+        PdfNumList(<double>[0, h, -w, 0, w + x, y]).output(_page, _buf);
         break;
     }
 
@@ -411,7 +411,7 @@ class PdfGraphics {
       return true;
     }());
 
-    PdfNumList([x, y, w, h]).output(_buf);
+    PdfNumList([x, y, w, h]).output(_page, _buf);
     _buf.putString(' re ');
 
     assert(() {
@@ -464,22 +464,22 @@ class PdfGraphics {
     _page.addFont(font);
 
     _buf.putString('${font.name} ');
-    PdfNum(size).output(_buf);
+    PdfNum(size).output(_page, _buf);
     _buf.putString(' Tf ');
     if (charSpace != null) {
-      PdfNum(charSpace).output(_buf);
+      PdfNum(charSpace).output(_page, _buf);
       _buf.putString(' Tc ');
     }
     if (wordSpace != null) {
-      PdfNum(wordSpace).output(_buf);
+      PdfNum(wordSpace).output(_page, _buf);
       _buf.putString(' Tw ');
     }
     if (scale != null) {
-      PdfNum(scale * 100).output(_buf);
+      PdfNum(scale * 100).output(_page, _buf);
       _buf.putString(' Tz ');
     }
     if (rise != null) {
-      PdfNum(rise).output(_buf);
+      PdfNum(rise).output(_page, _buf);
       _buf.putString(' Ts ');
     }
     if (mode != PdfTextRenderingMode.fill) {
@@ -543,7 +543,7 @@ class PdfGraphics {
       return true;
     }());
 
-    PdfNumList([x, y]).output(_buf);
+    PdfNumList([x, y]).output(_page, _buf);
     _buf.putString(' Td ');
 
     assert(() {
@@ -622,10 +622,11 @@ class PdfGraphics {
 
     if (color is PdfColorCmyk) {
       PdfNumList(<double>[color.cyan, color.magenta, color.yellow, color.black])
-          .output(_buf);
+          .output(_page, _buf);
       _buf.putString(' k ');
     } else {
-      PdfNumList(<double>[color!.red, color.green, color.blue]).output(_buf);
+      PdfNumList(<double>[color!.red, color.green, color.blue])
+          .output(_page, _buf);
       _buf.putString(' rg ');
     }
 
@@ -651,10 +652,11 @@ class PdfGraphics {
 
     if (color is PdfColorCmyk) {
       PdfNumList(<double>[color.cyan, color.magenta, color.yellow, color.black])
-          .output(_buf);
+          .output(_page, _buf);
       _buf.putString(' K ');
     } else {
-      PdfNumList(<double>[color!.red, color.green, color.blue]).output(_buf);
+      PdfNumList(<double>[color!.red, color.green, color.blue])
+          .output(_page, _buf);
       _buf.putString(' RG ');
     }
 
@@ -750,7 +752,8 @@ class PdfGraphics {
     }());
 
     final s = t.storage;
-    PdfNumList(<double>[s[0], s[1], s[4], s[5], s[12], s[13]]).output(_buf);
+    PdfNumList(<double>[s[0], s[1], s[4], s[5], s[12], s[13]])
+        .output(_page, _buf);
     _buf.putString(' cm ');
     _context.ctm.multiply(t);
 
@@ -780,7 +783,7 @@ class PdfGraphics {
       return true;
     }());
 
-    PdfNumList([x, y]).output(_buf);
+    PdfNumList([x, y]).output(_page, _buf);
     _buf.putString(' l ');
 
     assert(() {
@@ -803,7 +806,7 @@ class PdfGraphics {
       return true;
     }());
 
-    PdfNumList([x, y]).output(_buf);
+    PdfNumList([x, y]).output(_page, _buf);
     _buf.putString(' m ');
 
     assert(() {
@@ -829,7 +832,7 @@ class PdfGraphics {
       return true;
     }());
 
-    PdfNumList([x1, y1, x2, y2, x3, y3]).output(_buf);
+    PdfNumList([x1, y1, x2, y2, x3, y3]).output(_page, _buf);
     _buf.putString(' c ');
 
     assert(() {
@@ -1047,7 +1050,7 @@ class PdfGraphics {
       return true;
     }());
 
-    PdfNum(width).output(_buf);
+    PdfNum(width).output(_page, _buf);
     _buf.putString(' w ');
 
     assert(() {
@@ -1071,7 +1074,7 @@ class PdfGraphics {
     }());
 
     assert(limit >= 1.0);
-    PdfNum(limit).output(_buf);
+    PdfNum(limit).output(_page, _buf);
     _buf.putString(' M ');
 
     assert(() {
@@ -1097,7 +1100,7 @@ class PdfGraphics {
       return true;
     }());
 
-    PdfArray.fromNum(array).output(_buf);
+    PdfArray.fromNum(array).output(_page, _buf);
     _buf.putString(' $phase d ');
 
     assert(() {
@@ -1119,7 +1122,7 @@ class PdfGraphics {
       return true;
     }());
 
-    tag.output(_buf);
+    tag.output(_page, _buf);
     _buf.putString(' BMC ');
 
     assert(() {

@@ -87,7 +87,7 @@ class PdfChoiceField extends PdfAnnotWidget {
     g.setFillColor(textColor);
     g.setFont(font, fontSize);
 
-    params['/DA'] = PdfSecString.fromStream(object, buf);
+    params['/DA'] = PdfSecString.fromStream(buf);
 
     // What is /TU? Tooltip?
     //params['/TU'] = PdfString.fromString('Select from list');
@@ -257,9 +257,9 @@ abstract class PdfAnnotBase {
           [matrix[0], matrix[1], matrix[4], matrix[5], matrix[12], matrix[13]]);
     }
 
-    final bbox = boundingBox ?? PdfRect.fromPoints(PdfPoint.zero, rect.size);
+    final bBox = boundingBox ?? PdfRect.fromPoints(PdfPoint.zero, rect.size);
     s.params['/BBox'] =
-        PdfArray.fromNum([bbox.x, bbox.y, bbox.width, bbox.height]);
+        PdfArray.fromNum([bBox.x, bBox.y, bBox.width, bBox.height]);
     final g = PdfGraphics(s, s.buf);
 
     if (selected && name != null) {
@@ -285,11 +285,11 @@ abstract class PdfAnnotBase {
     }
 
     if (content != null) {
-      params['/Contents'] = PdfSecString.fromString(object, content!);
+      params['/Contents'] = PdfSecString.fromString(content!);
     }
 
     if (name != null) {
-      params['/NM'] = PdfSecString.fromString(object, name!);
+      params['/NM'] = PdfSecString.fromString(name!);
     }
 
     if (flags != null && flags!.isNotEmpty) {
@@ -297,7 +297,7 @@ abstract class PdfAnnotBase {
     }
 
     if (date != null) {
-      params['/M'] = PdfSecString.fromDate(object, date!);
+      params['/M'] = PdfSecString.fromDate(date!);
     }
 
     if (color != null) {
@@ -305,11 +305,11 @@ abstract class PdfAnnotBase {
     }
 
     if (subject != null) {
-      params['/Subj'] = PdfSecString.fromString(object, subject!);
+      params['/Subj'] = PdfSecString.fromString(subject!);
     }
 
     if (author != null) {
-      params['/T'] = PdfSecString.fromString(object, author!);
+      params['/T'] = PdfSecString.fromString(author!);
     }
 
     if (_appearances.isNotEmpty) {
@@ -377,7 +377,7 @@ class PdfAnnotNamedLink extends PdfAnnotBase {
     params['/A'] = PdfDict(
       {
         '/S': const PdfName('/GoTo'),
-        '/D': PdfSecString.fromString(object, dest),
+        '/D': PdfSecString.fromString(dest),
       },
     );
   }
@@ -413,7 +413,7 @@ class PdfAnnotUrlLink extends PdfAnnotBase {
     params['/A'] = PdfDict(
       {
         '/S': const PdfName('/URI'),
-        '/URI': PdfSecString.fromString(object, url),
+        '/URI': PdfSecString.fromString(url),
       },
     );
   }
@@ -522,13 +522,13 @@ class PdfAnnotPolygon extends PdfAnnotBase {
     final flippedPoints =
         points.map((e) => PdfPoint(e.x, rect.height - e.y)).toList();
 
-    final verticies = <num>[];
+    final vertices = <num>[];
     for (var i = 0; i < flippedPoints.length; i++) {
-      verticies.add(flippedPoints[i].x);
-      verticies.add(flippedPoints[i].y);
+      vertices.add(flippedPoints[i].x);
+      vertices.add(flippedPoints[i].y);
     }
 
-    params['/Vertices'] = PdfArray.fromNum(verticies);
+    params['/Vertices'] = PdfArray.fromNum(vertices);
 
     if (interiorColor != null) {
       params['/IC'] = PdfArray.fromColor(interiorColor!);
@@ -573,20 +573,20 @@ class PdfAnnotInk extends PdfAnnotBase {
   ) {
     super.build(page, object, params);
 
-    final verticies = List<List<num>>.filled(points.length, <num>[]);
+    final vertices = List<List<num>>.filled(points.length, <num>[]);
     for (var listIndex = 0; listIndex < points.length; listIndex++) {
       // Flip the points on the Y axis.
       final flippedPoints = points[listIndex]
           .map((e) => PdfPoint(e.x, rect.height - e.y))
           .toList();
       for (var i = 0; i < flippedPoints.length; i++) {
-        verticies[listIndex].add(flippedPoints[i].x);
-        verticies[listIndex].add(flippedPoints[i].y);
+        vertices[listIndex].add(flippedPoints[i].x);
+        vertices[listIndex].add(flippedPoints[i].y);
       }
     }
 
     params['/InkList'] =
-        PdfArray(verticies.map((v) => PdfArray.fromNum(v)).toList());
+        PdfArray(vertices.map((v) => PdfArray.fromNum(v)).toList());
   }
 }
 
@@ -632,7 +632,7 @@ abstract class PdfAnnotWidget extends PdfAnnotBase {
     params['/FT'] = PdfName(fieldType);
 
     if (fieldName != null) {
-      params['/T'] = PdfSecString.fromString(object, fieldName!);
+      params['/T'] = PdfSecString.fromString(fieldName!);
     }
 
     final mk = PdfDict();
@@ -847,10 +847,10 @@ class PdfFormField extends PdfAnnotWidget {
   void build(PdfPage page, PdfObject object, PdfDict params) {
     super.build(page, object, params);
     if (alternateName != null) {
-      params['/TU'] = PdfSecString.fromString(object, alternateName!);
+      params['/TU'] = PdfSecString.fromString(alternateName!);
     }
     if (mappingName != null) {
-      params['/TM'] = PdfSecString.fromString(object, mappingName!);
+      params['/TM'] = PdfSecString.fromString(mappingName!);
     }
 
     params['/Ff'] = PdfNum(fieldFlagsValue);
@@ -923,13 +923,13 @@ class PdfTextField extends PdfFormField {
     final g = PdfGraphics(page, buf);
     g.setFillColor(textColor);
     g.setFont(font, fontSize);
-    params['/DA'] = PdfSecString.fromStream(object, buf);
+    params['/DA'] = PdfSecString.fromStream(buf);
 
     if (value != null) {
-      params['/V'] = PdfSecString.fromString(object, value!);
+      params['/V'] = PdfSecString.fromString(value!);
     }
     if (defaultValue != null) {
-      params['/DV'] = PdfSecString.fromString(object, defaultValue!);
+      params['/DV'] = PdfSecString.fromString(defaultValue!);
     }
     if (textAlign != null) {
       params['/Q'] = PdfNum(textAlign!.index);

@@ -195,7 +195,8 @@ See https://github.com/DavBfr/dart_pdf/wiki/Fonts-Management
   /// Draw some text
   void putText(PdfStream stream, String text) {
     try {
-      PdfString(latin1.encode(text), PdfStringFormat.literal).output(stream);
+      PdfString(latin1.encode(text), PdfStringFormat.literal)
+          .output(this, stream);
     } catch (_) {
       assert(() {
         print(_cannotDecodeMessage);

@@ -30,28 +30,28 @@ class PdfInfo extends PdfObjectDict {
       this.producer})
       : super(pdfDocument) {
     if (author != null) {
-      params['/Author'] = PdfSecString.fromString(this, author!);
+      params['/Author'] = PdfSecString.fromString(author!);
     }
     if (creator != null) {
-      params['/Creator'] = PdfSecString.fromString(this, creator!);
+      params['/Creator'] = PdfSecString.fromString(creator!);
     }
     if (title != null) {
-      params['/Title'] = PdfSecString.fromString(this, title!);
+      params['/Title'] = PdfSecString.fromString(title!);
     }
     if (subject != null) {
-      params['/Subject'] = PdfSecString.fromString(this, subject!);
+      params['/Subject'] = PdfSecString.fromString(subject!);
     }
     if (keywords != null) {
-      params['/Keywords'] = PdfSecString.fromString(this, keywords!);
+      params['/Keywords'] = PdfSecString.fromString(keywords!);
     }
     if (producer != null) {
       params['/Producer'] =
-          PdfSecString.fromString(this, '$producer ($_libraryName)');
+          PdfSecString.fromString('$producer ($_libraryName)');
     } else {
-      params['/Producer'] = PdfSecString.fromString(this, _libraryName);
+      params['/Producer'] = PdfSecString.fromString(_libraryName);
     }
 
-    params['/CreationDate'] = PdfSecString.fromDate(this, DateTime.now());
+    params['/CreationDate'] = PdfSecString.fromDate(DateTime.now());
   }
 
   static const String _libraryName = 'https://github.com/DavBfr/dart_pdf';

@@ -33,7 +33,6 @@ class PdfMetadata extends PdfObject<PdfDictStream> {
   ) : super(
           pdfDocument,
           params: PdfDictStream(
-            object: pdfDocument.catalog,
             compress: false,
             encrypt: false,
           ),

@@ -62,7 +62,7 @@ class PdfNames extends PdfObjectDict {
     final keys = _dests.keys.toList()..sort();
 
     for (final name in keys) {
-      dests.add(PdfSecString.fromString(this, name));
+      dests.add(PdfSecString.fromString(name));
       dests.add(_dests[name]!);
     }
 
@@ -70,8 +70,8 @@ class PdfNames extends PdfObjectDict {
     if (dests.values.isNotEmpty) {
       dict['/Names'] = dests;
       dict['/Limits'] = PdfArray([
-        PdfSecString.fromString(this, keys.first),
-        PdfSecString.fromString(this, keys.last),
+        PdfSecString.fromString(keys.first),
+        PdfSecString.fromString(keys.last),
       ]);
     }
     params['/Dests'] = dict;

@@ -23,28 +23,22 @@ import '../format/stream.dart';
 import 'diagnostic.dart';
 
 /// Base Object used in the PDF file
-abstract class PdfObject<T extends PdfDataType>
-    with PdfDiagnostic, PdfObjectBase {
+abstract class PdfObject<T extends PdfDataType> extends PdfObjectBase
+    with PdfDiagnostic {
   /// This is usually called by extensors to this class, and sets the
   /// Pdf Object Type
   PdfObject(
     this.pdfDocument, {
     required this.params,
-    this.objgen = 0,
+    int objgen = 0,
     int? objser,
-  }) : objser = objser ?? pdfDocument.genSerial() {
+  }) : super(objser: objser ?? pdfDocument.genSerial(), objgen: objgen) {
     pdfDocument.objects.add(this);
   }
 
   /// This is the object parameters.
   final T params;
 
-  @override
-  final int objser;
-
-  @override
-  final int objgen;
-
   /// This allows any Pdf object to refer to the document being constructed.
   final PdfDocument pdfDocument;
 
@@ -81,7 +75,7 @@ abstract class PdfObject<T extends PdfDataType>
   }
 
   void writeContent(PdfStream os) {
-    params.output(os, verbose ? 0 : null);
+    params.output(this, os, verbose ? 0 : null);
     os.putByte(0x0a);
   }
 

@@ -38,7 +38,7 @@ class PdfObjectDict extends PdfObject<PdfDict> {
   @override
   void writeContent(PdfStream os) {
     if (params.isNotEmpty) {
-      params.output(os, pdfDocument.verbose ? 0 : null);
+      params.output(this, os, pdfDocument.verbose ? 0 : null);
       os.putByte(0x0a);
     }
   }

@@ -37,10 +37,9 @@ class PdfObjectStream extends PdfObjectDict {
   @override
   void writeContent(PdfStream os) {
     PdfDictStream.values(
-      object: this,
       isBinary: isBinary,
       values: params.values,
       data: buf.output(),
-    ).output(os, pdfDocument.verbose ? 0 : null);
+    ).output(this, os, pdfDocument.verbose ? 0 : null);
   }
 }

@@ -125,7 +125,7 @@ class PdfOutline extends PdfObjectDict {
 
     // These are for kids only
     if (parent != null) {
-      params['/Title'] = PdfSecString.fromString(this, title!);
+      params['/Title'] = PdfSecString.fromString(title!);
 
       if (color != null) {
         params['/C'] = PdfArray.fromColor(color!);
@@ -136,7 +136,7 @@ class PdfOutline extends PdfObjectDict {
       }
 
       if (anchor != null) {
-        params['/Dest'] = PdfSecString.fromString(this, anchor!);
+        params['/Dest'] = PdfSecString.fromString(anchor!);
       } else {
         final dests = PdfArray();
         dests.add(dest!.ref());

@@ -20,7 +20,6 @@ import '../format/dict.dart';
 import '../format/name.dart';
 import '../format/num.dart';
 import '../format/string.dart';
-import 'object.dart';
 import 'object_dict.dart';
 
 enum PdfPageLabelStyle {
@@ -53,7 +52,7 @@ class PdfPageLabel {
   final String? prefix;
   final int? subsequent;
 
-  PdfDict toDict(PdfObject obj) {
+  PdfDict toDict() {
     final PdfName? s;
     switch (style) {
       case PdfPageLabelStyle.arabic:
@@ -77,7 +76,7 @@ class PdfPageLabel {
     return PdfDict({
       if (s != null) '/S': s,
       if (prefix != null && prefix!.isNotEmpty)
-        '/P': PdfSecString.fromString(obj, prefix!),
+        '/P': PdfSecString.fromString(prefix!),
       if (subsequent != null) '/St': PdfNum(subsequent!)
     });
   }
@@ -191,7 +190,7 @@ class PdfPageLabels extends PdfObjectDict {
     final nums = PdfArray();
     for (final entry in labels.entries) {
       nums.add(PdfNum(entry.key));
-      nums.add(entry.value.toDict(this));
+      nums.add(entry.value.toDict());
     }
 
     params['/Nums'] = nums;

@@ -129,8 +129,8 @@ class PdfTtfFont extends PdfFont {
       '/Subtype': const PdfName('/CIDFontType2'),
       '/CIDSystemInfo': PdfDict({
         '/Supplement': const PdfNum(0),
-        '/Registry': PdfSecString.fromString(this, 'Adobe'),
-        '/Ordering': PdfSecString.fromString(this, 'Identity-H'),
+        '/Registry': PdfSecString.fromString('Adobe'),
+        '/Ordering': PdfSecString.fromString('Identity-H'),
       })
     });
 

@@ -20,18 +20,15 @@ import 'dart:io';
 import 'package:pdf/src/priv.dart';
 import 'package:test/test.dart';
 
-class BasicObject with PdfObjectBase {
-  const BasicObject(this.objser);
-
-  @override
-  final int objser;
+class BasicObject extends PdfObjectBase {
+  const BasicObject(int objser) : super(objser: objser);
 
   @override
   bool get verbose => true;
 
   void write(PdfStream os, PdfDataType value) {
     os.putString('$objser $objgen obj\n');
-    value.output(os, verbose ? 0 : null);
+    value.output(this, os, verbose ? 0 : null);
     os.putByte(0x0a);
     os.putString('endobj\n');
   }
@@ -57,7 +54,6 @@ void main() {
     });
 
     final content = PdfDictStream(
-      object: const BasicObject(1),
       data: latin1.encode('30 811.88976 m 200 641.88976 l S'),
     );